Question

13x+51=324
уравнение ​

Answer 1

$13x+51=324\\13x=324-51\\13x=273\\x=21$

$\arraycolsep=0.05em\begin{array}{c c c c r r @{\;}l | l}& 2 & 7 & 3 &&& & \;13\\\cline{1-1}\cline{8-8}~ & 2&6 &&& & & \; 21\\\cline{1-5}& & 1 & 3 & \\\cline{2-2}& & 1 & 3 & \\\cline{3-6}& & & 0 \\\end{array}$